On3 Performance Dual-Pump Return-Style Fuel System (1200HP), 525/320lph
Fits 2018-2020 5.0L V8
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A dual-pump fuel module that replaces the factory pump hanger with a primary pump for normal driving and a second 320lph pump that kicks in only under boost, converting the stock returnless system into a pressure-regulated, return-style setup.
why this one — On3 documented 1,037 rwhp (about 1,200 hp at the flywheel) on E85 with this system on their own test truck, and the secondary pump staying off until boost keeps everyday drivability close to stock.
Fuel delivery support hardware; raises fuel headroom for other power mods but carries no standalone horsepower or torque claim.
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